Where is the layer stored (on the k-drive): k:\gisdata\other\hazmat.e00

This GIS layer was last updated on: 2/26/97

This metadata was last updated on: 3/20/97

This layer's FGDC category description is: Other (Non-FGDC)

Data Set Description:
This layer contains the locations of Hazardous Materials Facilities with business locations in the City of Oakland. Data for these facilities is captured by the inspectors of the Office of Emergency Services on an ongoing basis. Because of this active data maintenance program, this layer contains very detailed and current information about hazardous materials facilities.

Data Source History:
Vibhor Jain, OES, captures data collected in the field by OES hazmat inspectors (LeRoy Griffin, Steve Craford, etc.) in a Microsoft Excel program. He then converts the Excel file to a DBF format, imports the DBF into ArcView 2.1 and geocodes each facility by address to the GIS streets layer.

Quality Check:
The match-rate for geocoding hazmat facilities has been approximately 80% (unexpectedly low) due to missing streets in the airport area and Port of Oakland area. This omission has recently been corrected (these areas lacked orthophoto coverage), and future updates to the hazmat layer will use this corrected streets version to establish the locations of hazmat facilities.

Update Frequency:
Monthly or as per Vibhor Jain's schedule of updates.

Update process:
As Vibhor Jain receives new hazmat data from the OES inspectors, he updates his Excel spreadsheet. Over intervals still to be determined, Vibhor posts these changes to a contact in OCIS for conversion into a GIS layer via the geocoding process.